Hermitian stochastic methodology for X-ray superfluorescence

• URL: http://arxiv.org/abs/2402.04069v5
• Date: Thu, 13 Jun 2024 19:28:44 GMT
• Title: Hermitian stochastic methodology for X-ray superfluorescence
• Authors: Stasis Chuchurka, Vladislav Sukharnikov, Nina Rohringer,
• Abstract summary: A recently introduced theoretical framework for modeling the dynamics of X-rayaxial spontaneous emission is based on sampling of the density matrix of quantum emitters and the radiation field. While based on first principles and providing valuable theoretical insights, the original differential equations exhibit divergences and numerical instabilities. Here, we resolve this issue by accounting the components perturbatively.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A recently introduced theoretical framework for modeling the dynamics of X-ray amplified spontaneous emission is based on stochastic sampling of the density matrix of quantum emitters and the radiation field, similarly to other phase-space sampling techniques. While based on first principles and providing valuable theoretical insights, the original stochastic differential equations exhibit divergences and numerical instabilities. Here, we resolve this issue by accounting the stochastic components perturbatively. The refined formalism accurately reproduces the properties of spontaneous emission and proves universally applicable for describing all stages of collective X-ray emission in paraxial geometry, including spontaneous emission, amplified spontaneous emission, and the non-linear regime. Through numerical examples, we analyze key features of superfluorescence in one-dimensional approximation. Importantly, single realizations of the underlying stochastic equations can be fully interpreted as individual experimental observations of superfluorescence.

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